Mississippi Math FA.A.32
The Standard
Add and subtract polynomials using appropriate strategies (e.g.,by using Algebra Tiles).
2025 Mississippi College- and Career-Readiness Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students add and subtract polynomials by combining terms with the same variable and exponent. When subtracting, they change the sign of every term being taken away before combining like terms.
What Mastery Looks Like
- Given (3x² + 2x - 4) - (x² - 3x + 1), a student gets 2x² + 5x - 5. They can explain where each term in the answer came from.
Common Misconceptions
- Students may combine x² and x terms or add exponents when adding polynomials. When subtracting, they may change only the first sign inside the parentheses.
How to Assess It
- Exit ticket: Simplify (4x² - 3x + 2) - (x² + 5x - 6). Show how you handled the signs before combining like terms.
Lesson moves
Ways to Teach It
Model (x² + 2x + 1) + (2x² - x + 3) with signed algebra tiles, then group like tiles.
Ask, “Why does subtracting (x² - 3x + 1) change the sign of every term, not just x²?”
Put (2x² + x) + (x² - 3x), 3x² - 2x, and 3x² + 4x on cards; students choose the match and explain.
Draw garden beds sized x by (x + 3) and x by (2x + 1); have students write their total area.
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Printable FA.A.32 Worksheet
A ready-to-print activity worksheet aligned to FA.A.32, with an answer key for the teacher on its own page. No account needed.
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